Devices and methods for enabling portable secure communication using random cipher pad cryptography by enabling communications to be passed to the device from a host, encrypted and/or decrypted, and passed back to the host
US11201729B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 11, 2017 |
| Grant date | Dec 14, 2021 |
| Priority date | — |
| Expiry date | May 27, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/3226
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A cryptographic system includes a host device and a cryptographic device. For encryption, the host includes an application that is configured to enable a user to compose an unencrypted message on a user interface and transmit the unencrypted message. The cryptographic device is configured to receive the unencrypted message, encrypt the unencrypted message with RCPs on a non-volatile storage to create an encrypted message, and send the encrypted message to the host, which then transmits the encrypted message through a communication channel. For decryption, the host receives an encrypted message through the communication channel and sends it to the cryptographic device. The cryptographic device decrypts the encrypted message with the RCPs and sends the decrypted message back to the host, which presents the decrypted message on a display. The cryptographic device may be configured to destroy RCPs that have been used up.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.